/**************************************************************************/
/*  profiling.h                                                           */
/**************************************************************************/
/*                         This file is part of:                          */
/*                             GODOT ENGINE                               */
/*                        https://godotengine.org                         */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
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/* a copy of this software and associated documentation files (the        */
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/* distribute, sublicense, and/or sell copies of the Software, and to     */
/* permit persons to whom the Software is furnished to do so, subject to  */
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/* included in all copies or substantial portions of the Software.        */
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/**************************************************************************/

#pragma once

#include "profiling.gen.h"

// This header provides profiling primitives (implemented as macros) for various backends.
// See the "No profiling" branch at the bottom for a short description of the functions.

// To configure / use the profiler, use the --profiler_path and other --profiler_* arguments
// when compiling Godot. You can also find details in the SCSub file (in this folder).

// Note: It is highly recommended to avoid including this header in other header files.
//       Prefer including it in .cpp files only. The reason is that we want to keep
//       the recompile cost of changing the profiler as low as possible.

#if defined(GODOT_USE_TRACY)
// Use the tracy profiler.

#include "core/string/string_name.h"

#define TRACY_ENABLE

#include <tracy/Tracy.hpp>

namespace TracyInternal {
const char *intern_name(const StringName &p_name);
const tracy::SourceLocationData *intern_source_location(const void *p_function_ptr, const StringName &p_file, const StringName &p_function, uint32_t p_line);
} //namespace TracyInternal

// Define tracing macros.
#define GodotProfileFrameMark FrameMark
#define GodotProfileZone(m_zone_name) ZoneNamedN(GD_UNIQUE_NAME(__godot_tracy_szone_), m_zone_name, true)
#define GodotProfileZoneGroupedFirst(m_group_name, m_zone_name) ZoneNamedN(__godot_tracy_zone_##m_group_name, m_zone_name, true)
#define GodotProfileZoneGroupedEndEarly(m_group_name, m_zone_name) __godot_tracy_zone_##m_group_name.~ScopedZone();
#ifndef TRACY_CALLSTACK
#define GodotProfileZoneGrouped(m_group_name, m_zone_name)                                                                                                       \
	GodotProfileZoneGroupedEndEarly(m_group_name, m_zone_name);                                                                                                  \
	static constexpr tracy::SourceLocationData TracyConcat(__tracy_source_location, TracyLine){ m_zone_name, TracyFunction, TracyFile, (uint32_t)TracyLine, 0 }; \
	new (&__godot_tracy_zone_##m_group_name) tracy::ScopedZone(&TracyConcat(__tracy_source_location, TracyLine), true)
#else
#define GodotProfileZoneGrouped(m_group_name, m_zone_name)                                                                                                       \
	GodotProfileZoneGroupedEndEarly(m_group_name, m_zone_name);                                                                                                  \
	static constexpr tracy::SourceLocationData TracyConcat(__tracy_source_location, TracyLine){ m_zone_name, TracyFunction, TracyFile, (uint32_t)TracyLine, 0 }; \
	new (&__godot_tracy_zone_##m_group_name) tracy::ScopedZone(&TracyConcat(__tracy_source_location, TracyLine), TRACY_CALLSTACK, true)
#endif
#define GodotProfileZoneGroupedFirstScript(m_varname, m_ptr, m_file, m_function, m_line) \
	tracy::ScopedZone __godot_tracy_zone_##m_group_name(TracyInternal::intern_source_location(m_ptr, m_file, m_function, m_line))

// Memory allocation
#define GodotProfileAlloc(m_ptr, m_size) TracyAlloc(m_ptr, m_size)
#define GodotProfileFree(m_ptr) TracyFree(m_ptr)

void godot_init_profiler();
void godot_cleanup_profiler();

#elif defined(GODOT_USE_PERFETTO)
// Use the perfetto profiler.

#include <perfetto.h>

PERFETTO_DEFINE_CATEGORIES(
		perfetto::Category("godot")
				.SetDescription("All Godot Events"), );

// See PERFETTO_INTERNAL_SCOPED_EVENT_FINALIZER
struct PerfettoGroupedEventEnder {
	_FORCE_INLINE_ void _end_now() {
		TRACE_EVENT_END("godot");
	}

	_FORCE_INLINE_ ~PerfettoGroupedEventEnder() {
		_end_now();
	}
};

#define GodotProfileFrameMark // TODO
#define GodotProfileZone(m_zone_name) TRACE_EVENT("godot", m_zone_name);
#define GodotProfileZoneGroupedFirst(m_group_name, m_zone_name) \
	TRACE_EVENT_BEGIN("godot", m_zone_name);                    \
	PerfettoGroupedEventEnder __godot_perfetto_zone_##m_group_name
#define GodotProfileZoneGroupedEndEarly(m_group_name, m_zone_name) __godot_perfetto_zone_##m_group_name.~PerfettoGroupedEventEnder()
#define GodotProfileZoneGrouped(m_group_name, m_zone_name) \
	__godot_perfetto_zone_##m_group_name._end_now();       \
	TRACE_EVENT_BEGIN("godot", m_zone_name);
#define GodotProfileZoneGroupedFirstScript(m_varname, m_ptr, m_file, m_function, m_line) \\ TODO

#define GodotProfileAlloc(m_ptr, m_size)
#define GodotProfileFree(m_ptr)

void godot_init_profiler();
void godot_cleanup_profiler();

#elif defined(GODOT_USE_INSTRUMENTS)

#include <os/log.h>
#include <os/signpost.h>

namespace apple::instruments {

extern os_log_t LOG;
extern os_log_t LOG_TRACING;

typedef void (*DeferFunc)();

class Defer {
public:
	explicit Defer(DeferFunc p_fn) :
			_fn(p_fn) {}
	~Defer() {
		_fn();
	}

private:
	DeferFunc _fn;
};

} // namespace apple::instruments

#define GodotProfileFrameMark \
	os_signpost_event_emit(apple::instruments::LOG, OS_SIGNPOST_ID_EXCLUSIVE, "Frame");

#define GodotProfileZoneGroupedFirst(m_group_name, m_zone_name)                                           \
	os_signpost_interval_begin(apple::instruments::LOG_TRACING, OS_SIGNPOST_ID_EXCLUSIVE, m_zone_name);   \
	apple::instruments::DeferFunc _GD_VARNAME_CONCAT_(defer__fn, _, m_group_name) = []() {                \
		os_signpost_interval_end(apple::instruments::LOG_TRACING, OS_SIGNPOST_ID_EXCLUSIVE, m_zone_name); \
	};                                                                                                    \
	apple::instruments::Defer _GD_VARNAME_CONCAT_(__instruments_defer_zone_end__, _, m_group_name)(_GD_VARNAME_CONCAT_(defer__fn, _, m_group_name));

#define GodotProfileZoneGroupedEndEarly(m_group_name, m_zone_name) \
	_GD_VARNAME_CONCAT_(__instruments_defer_zone_end__, _, m_group_name).~Defer();

#define GodotProfileZoneGrouped(m_group_name, m_zone_name)                                                \
	GodotProfileZoneGroupedEndEarly(m_group_name, m_zone_name);                                           \
	os_signpost_interval_begin(apple::instruments::LOG_TRACING, OS_SIGNPOST_ID_EXCLUSIVE, m_zone_name);   \
	_GD_VARNAME_CONCAT_(defer__fn, _, m_group_name) = []() {                                              \
		os_signpost_interval_end(apple::instruments::LOG_TRACING, OS_SIGNPOST_ID_EXCLUSIVE, m_zone_name); \
	};                                                                                                    \
	new (&_GD_VARNAME_CONCAT_(__instruments_defer_zone_end__, _, m_group_name)) apple::instruments::Defer(_GD_VARNAME_CONCAT_(defer__fn, _, m_group_name));

#define GodotProfileZone(m_zone_name) \
	GodotProfileZoneGroupedFirst(__COUNTER__, m_zone_name)

#define GodotProfileZoneGroupedFirstScript(m_varname, m_ptr, m_file, m_function, m_line)

// Instruments has its own memory profiling, so these are no-ops.
#define GodotProfileAlloc(m_ptr, m_size)
#define GodotProfileFree(m_ptr)

void godot_init_profiler();
void godot_cleanup_profiler();

#else
// No profiling; all macros are stubs.

void godot_init_profiler();
void godot_cleanup_profiler();

// Tell the profiling backend that a new frame has started.
#define GodotProfileFrameMark
// Defines a profile zone from here to the end of the scope.
#define GodotProfileZone(m_zone_name)
// Defines a profile zone group. The first profile zone starts immediately,
// and ends either when the next zone starts, or when the scope ends.
#define GodotProfileZoneGroupedFirst(m_group_name, m_zone_name)
// End the profile zone group's current profile zone now.
#define GodotProfileZoneGroupedEndEarly(m_group_name, m_zone_name)
// Replace the profile zone group's current profile zone.
// The new zone ends either when the next zone starts, or when the scope ends.
#define GodotProfileZoneGrouped(m_group_name, m_zone_name)
// Tell the profiling backend that an allocation happened, with its location and size.
#define GodotProfileAlloc(m_ptr, m_size)
// Tell the profiling backend that an allocation was freed.
// There must be a one to one correspondence of GodotProfileAlloc and GodotProfileFree calls.
#define GodotProfileFree(m_ptr)

// Define a zone with custom source information (for scripting)
// m_varname is equivalent to GodotProfileZoneGrouped varnames.
// m_ptr is a pointer to the function instance, which will be used for the lookup.
// m_file, m_function are StringNames, m_line is a uint32_t, all used for the source location.
#define GodotProfileZoneGroupedFirstScript(m_varname, m_ptr, m_file, m_function, m_line)

#endif
